Central lubrication



J. BIJUR Jun@ 9 N93@ CENTRAL LUBRIGATIO'N original Filed Dec. 27,V 1924v2 sheets-sheet 1 a pi@ by Uw@ June 9,1936.. A 2, JTBIJUR 2,043,229

j CENTRAL LUBRICA-TION Original Filed Deo. 27, 1924 2 Sheets-Sheet 274 pfsf/f 9 9 m Patented June 9, 1936 rifles CENTRAL LUBRICATIQN JosephBijdr, deceased, late of New York, N. Y., by George Bijur, executor`NewYork, N. Y., assigner to Auto Research. Corporation, a corporation ofDelaware Original applicationlbecember 27, 1924, Serial Patent No.1,888,422., dated November 22, 1932. Divided and this applicationNovember i9, 1932, Serial No. 643,322

, 34 Claims.

I-Iis present inventionv relates to central lubrication and moreespecially to the lubrication of Some or all of the bearings in theoperating mechanical linkages.

Itis'among the objects of the invention to prevent rattle', to reducewear and to render more easy the operation of linkages and moreespecially toprovide effective and convenientrlubrication for thosepivot bearings of linkages such as may be used Vfor operating the brakesof automotive vehicles, which by reason of their large number,

their small size and their inaccessibility have notv been lubricatedheretofore, with any degree of regularity.

The invention in a preferred application is concerned with thelubrication of the linkages referred to, and in one aspect is concernedmore especially with the construction .and arrangement of conduit, bywhich the lubricant is passed through the linkage. l

His invention has among its objects to provide a serviceable conduit oflow cost, which provides the required yield or flexibility Where yieldshould occur,which is not subject to whipping, and

`which is substantially proof against rupture or leak fromvibration ofthe moving vehicle even in hard usage. His invention provides a conduitin the above relation,` the parts of which are not likely to be bent4 orbroken ofi by the usual irn- 'pactsencountered in ordinary usage, andwhich,

Whlleaccommodating the'various relative movementsy Without undue :strainat any part of the conduit-is, nevertheless, mechanically so strong andis retained securely in place upon the structure.

The desired results are accomplished according to the-present inventionby extending the lubricant conduit lengthwise of the linkage. The1ubricantis advantageously conveyed through the length of the linkage,the various elements of which are vbored or made hollow for the purposedesired; so that the lubricant duct is not only protected `within thelinkage, but, being an integral partfthereof, accommodates as does saidlinkage, the movement of the elements thereof.

Preferably the entire linkage is such that the lubricant'conduit iscompletely enclosed therein and accordingly protected thereby, thevariousV parts being structurally relatedA to inherently establishpassages for lubricant in correct nonleaking relationship, and tolubricate the various bearing surfaces in the length of the conduit, all

in the absence of any distinct lubricating attachments or connectionsapart from the mechanical structural assembly.

A familiar type of linkage includes an arm depending from the operatingrock shaft to which is pivoted the forward end of a pitman link, therear end of which is pivoted to a lever on the actuated mechanism.Objects of the invention are to 5 convey the lubricant reliablylengthwise of such linkage, without interfering with the normaloperation of the linkage or with the adjustments ordinarily effected inthe length of the pitman rod. Other objects are to lubricate with oilpassed along the linkage, the various bearings thereof including thoseat the' opposite ends of the pitman link, and without the need forunduly' tightening said bearings or making them more bulky or providingprotrusions thereon in order l5 to avoid loss or leak of lubricant fromthe bearings.

According to his invention, the pivot bearing of the pitman link withrespect to the arm on the rock shaft, from which it is operated, is in aor rear end of said pitman. Preferably, the lu- Y bricant is supplied tothe linkage through a xed inlet associated with the rock shaft whence itdrains through a duct longitudinally of the arm thereon to the upper orforward end of the pitman, thence longitudinally through the pitman tubeto the lower bearing thereof.

To avoid the loss of lubricant at any of the various joints in thelinkage, the pivot pin ofeach vsaid joint is preferably rigid with theencircling eye or terminal of the linkage element through Y which thelubricant is fed thereto and affords a duct for the lubricant extendingoutward to the bearing surface in the eye or terminal pivoted thereon ofthe succeeding element in the linkage train. Each mechanical element inthe train that has a bearing about a pivot pin, preferably has a duct sorelated to the pinV that the lubricant drainingY from the bearing willnaturally pass on, into the duct for flow to the bearings, rather thanto leak past the ends of thebearing to the road. By this arrangement,although the bearing structure is unenclosed the lubricant'at thebearing surface tends to spread outward rather than inward and thusinherently to exclude or Wash out any dust or dirt that might otherwisebe drawn into the bearing. The relativelyv rocking elements of thebearing preferably have a telescoping relation, to render more difficultthe entry of dust or dirt and in addition a peripheral groove isprovided on the inner of the elements adjacent the edge of the outerone, so that dirt or dust will tend to drop therethrough from thebearing rather than to work its way thereinto.

In other embodiments, an exit terminal of each mechanical element in thelinkage train extends into the inlet terminal of the next element in thetrain, said inlet terminal constituting a receptacle in which thebearing is contained, which receptacle drains through a duct in thelatter mechanical element to supply other bearings.

In the lubrication of an embodiment of brake in which rock shafts at thebrake shield and parallel to the axle transmit the hand and foot brakingimpulses respectively, through pitmans pivoted to levers mounted on theinner ends of said rock shafts, the lubricant supplied through each ofsaid pitmans is preferably passed onward through the associated lever,to lubricate the bearings therefor.

The invention from another aspect is concerned with the localdistribution of lubricant from an inlet at the brake to the variousbearings associated therewith and substantially regardless whether saidinlet is supplied through the brake operating pitmans or otherwise.

The invention provides convenient means for reliably lubricating all orany number of said bearings without the need for selective manipulationsor direct manual access to the individual bearings, and without conduitsprotruding or projecting, so as to be likely to be torn loose inordinary use of the vehicle.

Fig. 1 is a fragmentary view partly in section of one form of pitmanlink transmission,

Fig. 2 is a perspective view of one of the terminals and the boottherefor,

Fig. 3 is a view similar to Fig. 1 of an alternative construction,

Fig. 4 is a sectional View taken along the line 4 4 of Fig. 3,

Fig. 5 is a fragmentary sectional View taken along the line 5 5 of Fig.3,

Fig. 6 is a fragmentary detail View of an alternative form of linkconstruction,

Fig. '7 is a transverse sectional View taken along the line 1 1 of Fig.6,

Fig. 8 is a longitudinal sectional view taken along the line 8 8 of Fig.6, and

Fig. 9 is a fragmentary sectional view of an alternative form of pitmanlink terminal.

In Figs. 1 and 2 he has shown an arrangement of pitman rod or tube. Thearm M5 which is secured to the rock shaft |41 has a ball construction|49 at its lower end, which extends through a corresponding slot |49into a generally cylindrical terminal |55 screwed as at |5| upon thefollow pitman rod |52. Enclosed within the terminal |55 is a slidablebearing cup |53 urged by a coil spring |55 to press said ball against acomplementary cup |55 formed at the inner end of a closure plug |55threaded and locked into the extremity of the terminal |59. Thelubricant is conveyed through a bore |51 longitudinally of the arm |56plugged as at |58 at its lower end, outward through radial bores |59 and|69 in the ball from which the bearing of said ball is lubricated. Thespring |54. eifects preferably a tight bearing, so that lubricant willpass from the duct |59 largely into longitudinal duct IBI in the cup|53. A short length of metal pipe |62 rigidly fixed in the rear end ofcup |53 conveys the lubricant onward therethrough to drip into thelength of the tube |52. To avoid friction and to accommodate thecompression and expansion of spring |54 in operation and adjustment, thepipe |62 has a bearing in a bushing |63 at the extreme end of the tube|52. 'Ihe lubricant passes onward through the length of the tube to agenerally similar construction at the opposite end thereof. In thelatter construction, however, the pipe |64 is fixed in a bushing |65 inthe end of the pitman tube and slides at its opposite end in thelongitudinal bore |65 of the bearing cup |53' which bore delivers inpart to the ball bearing and in part into radial bore |59' in ball |48.The construction of terminal |55 is otherwise identical with thatdescribed and similar parts bear the same reference numerals primed.Radial duct |59 delivers lubricant to duct |41 in the lever |61, whichlatter corresponds to a suitable mechanism such as a brake mechanism oran automobile vehicle. Some of the lubricant from bore |59 will,however, pass through bore |60 to lubricate bearing cup |55. While thespherical or ball bearing construction shown is preferred, it will beunderstood that the bearings |48 and |48 may be cylindrical rather thanspherical.

It is preferred to provide a boot about each of the terminals in Fig. 1for the purpose of preventing the entry of dust at the substantialopening |59. A preferred embodiment of boot shown in this connectionincludes a sleeve element |68 of leather about the arm |46 clamped as at|69 and formed in a unit with a generally rectangular blank |15 also ofleather partially about the terminal and secured by a complementarysheet metal boot portion |1| at the otherwise uncovered part of theterminal, two pairs of ears |1| of which are clamped together bycorresponding bolts |12 to securely grip the terminal.

In Figs. 3, 4 and 5 is shown another embodlment of lubricating linkage,-in which the arms and the levers at the respective ends of the pitmanlink, are metal stampings conformed to provide the lubricant passages,special terminals being provided to accommodate such stamped members.The arm on the rock shaft comprises a pair of stampings |13 and |14,each having a longitudinal outwardly protruding embossment |15, therebydetermining a longitudinal oil duct therebetween. In order to provide anoutlet at the lower end of the duct |15 and yet afford suicient metalfor an adequate bearing thereat, a metal frame |16 is interposed betweensaid stampings and acts as a spacer therebetween. The two stampings andthe spacer are assembled into a unitary construction in any appropriatemanner, but preferably by bending tongues |11 integral with one of thestampings about the edge of the other. To afford a secure connection ofthe composite arm with respect to the rock shaft, so that it rocks as aunit therewith, the individual stampings are provided with reverselybent ends |18 extending outward therefrom, said ends and the mainlengths of said links being provided with non-circular, preferablyhexagonal eyes |19 corresponding to the similar conformation of the rockshafts.

The pitman formed of a hollow or tubular construction as in otherembodiments, has a terminal forging |8| secured in place by a socket |82threaded over the upper or forward end of said pitman. The terminalincludes a generally rectangular box-shaped conformation |83 beyond thetube, sustained in pivoted relation from the eye at the lower end of thecomposite arm |13 |14. Said eye comprises a bushing |84 extending athrough corresponding openings in the lower ends 7D orzthe.stampingselrand .|14g securediinpositiengx reacting against. :shbulder2253-iintegralltherefbym; collanflrpressed-thereon.::.The..bushihgt|845:with. A pin 248 through the1 -arm-=248fmain= tstsnuglygbetween. the'llateraliwalls.; |8Biioff.the.s tains 'the:spring.-252 andthecollar-'251i assembled box-:shaped,terminali4 |83,v.which wallsfare-prefsV withrespect to thearmvv 248.1 Lubricant deliveredli 5Vaelfably thickened .asat |84; where l.contacted .byy` through:longitudinal duct 2541in1th-armwitness th'eubushingnf,A pina1l88;extending Yftransversely wlllabexfseen is. directly applied tothebearing'pinl@ through. correspondingeyesnin1the;side:walls;oi- 25U'xandidropsxgth'erefrom into the "bottom-OF5 theeterminalA.'cham'bergzand;lthrciughfthe"bushing thewterrninal;iwhencer-itpassesfonward'- through-'fi |SAiandzfretainedfby; a :Cotter: pin: |89.;cornpletes. J theltubelto the bearing-at thelowerend .thereof-.fi-

transverselyofgthezbushing,lconyeys.thelulorif`v`preferablyatthreadecteymmal19031;255- Trn cantfrom the longitudinallyembossed .duct attachrsaid postto the:rectangularztube;itlreflatin thecomposite arm |13, |14 to the bearingure teriisspluggedwith arectangular metallfbloekfZSS-Jfffacerofirtliepini|88.;.Thelubricant.is;:admitted\` rivetedvinplacenas'at 25W-Whe post-255 bei-ng:l 15 .ttoltherockshaftsbythecbliquezduct:|.9|:through formed wasnana; integral extension thereof.,upon 154.5

theirock';shaft;deliyeringwinto the@ armfi|133``-|14'` which 'a suitableterminal1 socket=is-adistably through the gap between the polygonalshaft and. .t threadedr Preferably; :the terminalpcist extendsthexuppertandr openxendzof: embossment '1|15 eccentrically of the-'block256;"1f1'0m..near .the... whencezxthe :lubricantailowsf'.idownward;through.:1` lower face thereof, so that the axial bore@258ml e'saidgembossmentz and'V through :the: sawzkerf 1903-1:throu'ghrsaidpostand block unit is raf, a leveui'tl 201.".y

to :then-pin; :bearing il 88; thelatterzgdrainingeinto :11 ahuve'fthefbottomrof the .pitrnantube nto faeilitate'therbottom".ofpireceptaclef;|83:'.which,l in vturng,A draining of thelatter lfor eifective lubricationpfr delivers? lOIlgitudinally 4downward`"through the the: bearing or ybearings which arersupplied'-from-ftube1805150. the bearing atthe'lower end there` the-pitmantube..

ivf# An alternative embodiment of ybearing for the-2513;

Ther'lower. end of'zthe pitmanlink 'hasanad-r lower or rear end of thepitman `tube appearsrihM justableterminal |92. The: lever|93..operated-zr Section at-Fig..9.. This constructinincludesa ter-'fAfro-nrthepitman.isofconstruction'generallysiineAV minalzforging...26.05asocket .2604 l0f WhjCrrff-isf. ilar to'that shown'gattheupperfencl`and='before tthreaded upon the lower end ofithe pitmanlihkidescribedgmodied; howevengtoadaptitforbearef l and having agenerally cylindricalfeoncavity26| 30 ing connection1 with respect to`theeye |S4aon-te 1n its'lower side;.formed-midway betweentheparhr minal:|9211 Forvthis: purposefthe upper. endsofw; allelf'side wal1s.:262.0f.the forging.. Thefat end. theindividualstampingsi|951and.|96 are bent iwa1ls1263-of'thefconcavitydiverge downward; HSN to substantially.`completely encircle; as,.fat;i|9f1,f shownr; Intofthe concavity26`|1eXtends`theiupperm embracing; the hat` sides -of the eye S42l a pin200. bearing being completed by@J pivgt pin.zsilhwmgmtransverselythrough the 'sides` |93 Tand: :198:1 .of a head .extending.with a sliding -tin a correw the yoke and itszeneirclingstampingportionsgl 91;". Spending eye.26;1in nonesidewallfof:theforgingey and througlrthe eye |94; completing;` the-:bearing :pgthe': shank '.ofA said pin extending-throughea 40v assembly;-`Theernbossment'lf in the linksfarerfcorrespondinglbushing.@affliction-fitted into' thee401iopencatfftheirupper ends as-shown-atz22to draini.;l opposite' sidewallfof the forging whichlbushing the lubricant from the eye |94 downward tothey'` protrudes inward. A dis-hed spring .Washer-259i L bearing .forbearings to'besupplied'therefronfi-iAs encircling'. the; endV ofthe pin;255, conta-@Semen shown Pin the-drawings;l'iepreferstov employdustsforgingi "and reacts' against Cotter Qpinwzoiff excluding boots203; and24at: the opposite ends through the pivot pin to draw the head ofxthee'fof .the `pitman l-ink l. latter 'against eye 254 and to' urgeV sa-id'-eye rand' In Figsr to 8 is shown an alterriativefarrarige-`4 bushing..:268` into contact. It will `be apparentU f mentrv of the]pitmanfelement of a linkage; 111-; thatrattles thus avoided, thewearbetween'ftheVW steadef -thetsea-mlessftubularconstruction-pre;-thrust;` surfaces for eye 264 being automatically-1.."4

-viously described; hezconformsia sheet metal strip compensated'ifor. bythe expansion lof -spring=r2691 *50 r" bynlongitudinally bendingintof agenerallyv rec-5 Theilubricant isconveyed from the -pitmantube'mtangularitube. 239;..` 'Ihe'lateraliiedges of the-strip,` by a1bore.21.|. ircminear ther/lower part 'oilithe'4meet:atrZllfatvtheitop:ahdfmaybesoldered Lor; socketilfg-f said boreconnected through a short@ weldedyifrdesired,although this.isznotgiessential; Verticalitube .212.to deliver into` awellor-depres"n To .formsthe pivoti connection 'atzfthemuppengorsion'213inthe upper end of the eye 264 Whichlwell forwardenduof .thepitman, tubeythei upper, side; in turn drains'through abore 2-14 inthe'eyeto them thereof is cut away'as at. 24|;and-a U shaped yoke".bearing of the vpivot pin. The pivot pin preferably 242'1'is #slipped'over said:` endg.: overlapping :thel has a peripheral groove. 215thereabout which des sdest243. A terminal fitting..24'4rfencloses"theliversfoiLfinspart, to lubricate thebearing'surfaceM 6U sides 245 aswell as the end ofatheyoke. 242 but: of thepivot pin and. in part `toduct gwjlelngthg. 50 l is cutaway. at.` 245i'` tol .straddle the -pitmantube wise of the lever 265'11'0 supply other bearing surM anda is,weldedin"place-.\at: said cutaway part.'V facesA The tting244has'anintegral-neck 24.1 extending. The present application isupwardffrom thepitman,throughswhich .extends tionsera] No. 758,361,itheelower end. ofarm 2418 the .upper endzofwl'nchfiwhich matured asPatent No; 1,888,422; onmNow (not `show-n).` is afliXed ftozthe'roclcshaft. Ihe.:. vember 22 1932.

snugly betweenthe. sides 243;, of( theptman tube The lubricatinginstallations of thepresentap.l l

239. thassembl-y beingvfcompletd bywhepivot.. -plications may be.utilized ...to lubrieate others va division of applic'a'` filedDecember 211924,13@

pin --255iwhich extends..transyerselywthroughthe Chassis bea'fngs than'the 01H65'fiJSSOCated'With .therO termina-letting 244;- the-.yelrexmzAand :the sides:` brake Operatinemechanisms;-andrtherlubricatngm 243Y0f.1;he..1,ube 239, i Preferamy @01km 25.11.1311-' installation mayalso-beutilized toclubricatelbear-f- Y circlesthevarm 248-directly abovethe-neckeM-lfy ings-other thanthosefutilizedon.orinassociation and-.s`urged a.galnstsaid.neckfin dust-excluding withlautomobile chassis;orother vehicles. v Tle" relationbya coil spring .25.2aboutz-thearm:and- A lubricatinginstallationsdisclosed are'broadly apeJS plicable tomechanisms involving linkages or operating connections.

By the expression pitman utilized in the specification accompanying theclaims are included an elongated rigid element, such as indicated at |52in Fig. 1, |80 in Fig. 3, and 239 in Fig. G which transmits motion orpower between two reciprocating elements. For example the lever elements|46 of Fig. l, |14 of Fig. 3 and 253 of Fig. 6 respectively transmitmovement to these pitman elements. These pitman elements are providedwith lubricant passages extending therealong, and in the preferred formthe lubricant passageway is formed within the pitman element by causingsuch pitman element to have a tubular construction, as shown in Figs. 1,3 and 6. The expression tube and tubular element in the accompanyingclaims includes the constructions of Figs. 1, 3 and 6.

By the expression ferrule utilized in the specication and theaccompanying claims is meant a casing element which may take the form ofa receptacle, such as a cup or a sleeve. A cylindrical or sleeve typeferrule is shown in Fig. 1, while other embodiments show other type andconstructions of ferrules. In these ferrules or receptacles are usuallylocated the bearings connected between the pitman or the actuated leverwhich is to be lubricated.

What is claimed iszl. In a lubricated mechanism of the type having acontrol, an operated mechanism and an operating linkage train betweensaid control and said operated mechanism, said linkage train havingbearings to be lubricated, in combination, a pair of mechanical elementsin the linkage train, including an operating arm and an operated pitmanlink, said link being tubular and having a terminal receptacle fixedthereon, housing the corresponding end of said arm, means maintainingsaid pitman link assembled to said arm and constituting a bearing forthe end of said arm, a duct lengthwise of said arm supplying saidbearing, said receptacle draining to the tubular length of the pitman.

2. In a lubricated mechanism of the type having a control, an operatedmechanism and an operating linkage train between said control and saidoperated mechanism, said linkage train having bearings to be lubricated,in combination, a member near the control, a member substantially at themechanism to be operated and a longitudinally extending pitman linkconnecting said members, said link having a ferrule at one end,substantially enclosing the end of the corresponding member, and cupswithin said ferrule, spring-urged together and having rounded surfacesgripping the correspondingly rounded end of said member, said memberbeing provided with a longitudinal lubricant passageway extending thelength thereof, the enclosed end of said member being provided with aplurality of bores communicating with said passageway, one of said cupsbeing provided with a bore communicating with said bores in said end ofsaid member, and said pitman link being also provided with a lubricantpassageway communicating with said cup bore, whereby lubricant may passfrom said member to said pitman link.

3. In a lubricated mechanism of the type having a control, an operatedmechanism and an operating linkage train between said control and saidoperated mechanism, said linkage train having bearings to be lubricated,in combination, an arm near the control, a lever substantially at theoperated mechanism and a longitudinally extending tubular pitman linkconnecting said arm and said lever, said link having a ferrule at eachend, each substantially enclosing the end of the corresponding arm orlever, and cups within said ferrules, spring-urged together and havingrounded sur- 5 faces gripping the correspondingly rounded end of saidarm or lever, to constitute bearings therefor, a duct delivering throughthe rounded end thereof to lubricate the corresponding bearing anddraining through a duct in the inner of the cups at the forward end ofthe tubular rod and lengthwise therethrough to the bearing at theopposite end thereof.

4. The combination set forth in claim 3 in which the lever at thedelivery end of the pitman drains lubricant therefrom to the pivot mountof said lever.

5. In a lubricated mechanism of the type having a control, an operatedmechanism and an operating linkage train between said control and said20 operated mechanism, said linkage train having bearings to belubricated, in combination, a cross shaft, an arm thereon having arounded end, a tubular pitman, a ferrule i'lxed upon the forward endthereof, said ferrule having rounded cups 25 spring-pressed to grip saidrounded end in bearing relation, a ferrule at the rear end of saidpitman having rounded cups therein, a lever mounted at the operatedmechanism and having a rounded end extending into said latter ferruleand 30 spring-pressed between said latter cups, means supplyinglubricant to said bearings at the ends of said pitman, said meanscomprising a duct through said arm and through the rounded end thereofto lubricate the bearing in said forward 35 ferrule and draining througha longitudinal bore in the inner of the associated cups to the pitman,an outlet pipe at the rear end of said pitman telescoped into acorresponding longitudinal bore in the inner of the cups on the rearferrule, said latter bore delivering to the bearing in the rear ferrule.

6. In a lubricated mechanism of the type having a control, an operatedmechanism and an operating linkage train between said control and 45said operated mechanism, said linkage train having bearings to belubricated, in combination, a pitman having a pivot mount at one endwith respect to an operating arm and a pivot mount at the other end withrespect to an operated lever, said pitman comprising a rod, ferrules atthe opposite ends of said rod, each having a fixed cup therein at theextreme end thereof, and a second cup spring-pressed toward said fixedrounded cup for gripping the rounded end of the associated arm or levertherebetween, said springpressed cups having longitudinal borestherethrough, and pipes telescoped thereinto, each extending part wayinto the rod, said rod having a bore the length thereof.

7. The combination set forth in claim 6 in which the pipe at the forwardend of the rod is xed in the corresponding cup and has a slidingrelation with respect to a bushing in the end of the rod, and the pipeat the rear end is xed with respect to the rod and has a sliding fit inthe corresponding cup.

8. In a linkage, in combination, a lever member, a pitm-an link, saidpitman link having a ferrule at an end thereof, cups within saidferrule, said lever member having a rounded end extending into saidferrule between said cups,

a spring pressing said cups together into bearing relation with saidrounded end and a dustexcluding boot including a shank over a part ofber extending 2,043,229 the lever; a cover -member unitary'therewith exitending about said ferrule; and a" complementary *element overlappingthe edges of said cover-meinabout' the cover' membersy'and gripping-theferrule to maintain*infposition'the parts of the dust excluding-boo t,vvsaid member `H-being provided with a longitudinal 'lubricant pas-Aclosed endeof said vmember being provided with l lof aifplurality ofbores' communicating with" said passageway, one of said cupsbeingprovided with a arbore-'Icommunicating withsalid boresA in -`saidmember, and said vpitman i link V`be- 4fingalso providedl witha'lubricant passageway communicating with said cup bore, whereby lu--9.l In alubricated rnechanismoi the typehav- "fing a control, anoperated mechanismrandV an operating linkagetrainbetween said controland `=f-ing"*bearings toA be lubricated, incombination, a

l lever,

a pitman element pivoted thereto-at one end, a second lever towhich theoppositeend of Isaidpitman `is pivoted, said-first pivot connec- 10. Thecombination* set forthin claim 9"in which a dust excluding bootencloses'thereceptacle and-has a neck encircling the lever.

\ 11. In a lubricated mechanism'ofthe type havl" ing a control, anoperated mechanism and an operating-linkage train between' said "controland said operated mechanism, said linkagetrain having bearings tobelubricated, `in combination, a

' pitman, a lever operated-thereby, said leverhav- "ing-a1 pivot'connection with respect to said pit- E-`m`an, `said connectioncomprising a channel formed member on `the lever, an eye on the end "fofthe-pitman straddled by said channel conformation, a` pintransversely'through said lchanjfnel and `saideye anda bearing mounttherefor, "said pitman constitutinga tube for conveying -lubricant to'said eye, said lever including a con- 1 duit draining from the bottomvof said channel to H"the bearing mount.

4`-`1-2. The combination set forth'in claimy 11 in 1whiehfthe eye has ashank threaded over the end of "the pitman and a dust excluding Abootis` an- '--`ch'ored in-a corresponding groove in said shank'gland-extends over said pivot connection and has f1 a neck encirclingsaid lever.

- 13.- Ina lubricated mechanism of the type hav- `Eing a control,`anoperated mechanism .and an Voperatinglinkage train between said Vcontroland -said operated mechanism, -said linkage trainhaving' bearings to belubricated, `in combination, a pitman link including a tube, avbearingiitting l at 'one end thereof `threaded onto the end'of said tubeand constituting-a rectangular receptacle therebeyond for housing theend of anl operating arm therefor, anda'fbe'aring construction at one'end of said pitman comprising a fer- 1 rule adjustably threaded oversaid end and having an integral eye'b'eyondfsaid end, anda ducttherethrough leading to said eye.

`14. In a lubricated mechanism ofthe typehav- "ing a controL'an operatedmechanism andan operating linkage train between said control and vsaidoperated mechanism; sai-d linkage train hav- `lubricant is supplied tothe embossment,

-fperposed relationship, 'between' said stampings, said stampings having'interlocking lateral tongues, longitudinal embossments determining anoil passage, a bearing eye ingbearings tov be lubricated,in'combination, a

shaft, an arm rigid therewith, depending vtherefrom and having aducttherethrough, a pitman operated from said arm, said pitman including atube, a rectangular receptacle fittedon the end thereof and lodging theend vof said arm, a pin transversely through lsaid receptacle "-sagewayextending the length thereof, theenl `and said end to constitute thebearing therefor, a ferrule on the opposite endA of said rod having Vaneye therein, a lever operated by said ferrule and having a lever bearingwith respect to said eye, said lever including a channel formationstraddling said eye and a pin through said eye Vand said channelformation to constitute a bearing therefor and a draining connectionfrom said? bearing longitudinally of said lever to supply the leverbearing.

`'-15.' In a linkage, in combination, a composite oil conveying levercomprising a pair of stamped metal "members, each provided with anon-cirrcular eye conformation, at one end for keying onto an operatingshaft, and having a hollow conformation therebetween to convey lubricantlongitudinally thereof, to an eye conformation at the other end thereof,and a bearing at said latter eye conformation.

16. In a linkage, in combination, a pair of superposed sheet metalmembers affixed to each other and having a longitudinal embossmenttherebetween to constitute an oil duct, said stampings being providedwith eyes at each end thereof, one of said eyes constituting a keyingconnection with respect to a shaft through which the other of said eyeshaving a bearing associated therewith supplied with lubricanttransmitted longitudinally of said embossment.

17. In a linkage, in combination, a lever comprising a pair of metalstampings aiiixed in superposed relation and having longitudinalembossments therein to constitute an oil duct longitudinally thereof, aspacer frame between said stampings to prevent escape of lubricantlaterally and to afford an outlet to the bearing at the end of theembossment.

18. VIn a linkage, in combination, a rock shaft having a non-circularpart, a lever rotatable therewith, said lever comprising a pair ofstampings connected in superposed relationship, each having a reverselybent end ing opening fitted over said non-circular shaft,

`each of said levers being embossed outwardly below said shaft toconstitute a passage for lubricant supplied therebetween through a ductin said shaft, and a bearing mounted at the lower end of said lever andsupplied with lubricant deliv- -ered through said embossment.

'19. In a linkage, in combination, a composite lubricant conveying levercomprising a pair of stamped elements in superposed relationship securedtogether, said stampings having emboss- Vments longitudinally thereof toconstitute an oil duct and having eyes at the lower ends thereof,said'stampings being spaced apart at said lower ends to constitute abearing support, a bearing bushing fixed in said eyes, a coactingbearing member straddling said bushing and a pin through said straddlingmember and said bushing to maintain the bearing assembly.

20. In a linkage, in combination, a composite lever comprising a pair ofmetal stampings in sua spacing frame interposed with a correspondat oneend of said assembly, said embossments terminating adjacent said eye anddelivering lubricant thereto through the interposed space, and means foradmitting lubricant at the opposite end of said embossments.

21. The combination set forth in claim 20 in which the lever is mountedon a non-circular shaft, by a reversely bent U-shaped construction oneach of the stampings, through which reversely bent portions and theinterposed main length of the stamping the non-circular shaft extendsfor secure keying connection.

22. In a linkage, in combination, a composite lever comprising a pair ofstamped metal members associated together, a U-member, the ends of saidstainpings being reversely bent, each to embrace one of the legs of theU-member, said U- member constituting a bearing support for said lever.

23. In a linkage, in combination, a composite lever comprising a pair ofstamped metal members associated together, a U-member, the ends of saidstampings being reversely bent, each to embrace the adjacent leg of theU-member, an eye member straddled by said U-member, and a bearing pinextending transversely through said U-member and said eye.

24. In a linkage, in combination, a pivot connection between the ends ofa pitman link and a lever, said connection comprising a substantiallyvertical inverted socket on the link, a lever eye therein, the base ofthe socket being above the eye, a pivot pin lodged in said socket andthrough said eye to constitute a bearing therefor, and a lubricant inletto said socket extending through the base thereof and delivering to adepression in the upper part of said eye draining through a bore to thepivot pin.

25. In a linkage, in combination, a pitman link comprising an oilconveying tube, a terminal thereon, said terminal; including adownwardly extending generally cylindrical trough, a lever having an eyeat its upper end extending into said trough, a pivot pin extendingthrough the side Walls of said trough, and through said eye toconstitute a bearing therefor, a lubricant inlet through said terminaldelivering directly above said eye, said eye having a well interceptingthe drip from said inlet and draining through a bore to the bearingsurface of the pivot pin.

26. The combination set forth in claim 25 in which the pivot pin has aperipheral groove and drains to a longitudinal duct in said lever forsupplying lubricant to an associated bearing.

27. In a linkage, in combination, a pitman comprising a tube, a terminalthereon, having a generally rectangular block provided with a concavityin the lower surface thereof, a lever having an eye extending into saidconcavity, a pivot pin having a head in one side of said block, a shankconstituting a bearing for said lever eye and extending through theother side of said block, a bushing encircling said pin and fitting inthe latter side of the block, a cotter pin through said pin, and aspring interposed between said cotter pin and said block to drawtogether the head of said pin, said eye and said bushing, said pitman,said terminal, said lever, said eye and said pin all being provided withintercommunicating lubricant passageways.

28. In a linkage, in combination, an arm, a pitman operated therefrom,said pitman having a generally rectangular trough conformation at itsend, a metallic boot construction closing the end of said pitman andstraddling the sides and having a neck encircling said arm, said armhaving an eye at its lower end and a pivot pin through the sides of saidtrough and said eye, said arm, and said eye all being provided withintercommuni- 5 eating lubricant passageways.

29. The combination set forth in claim 28 in which a longitudinal ductthrough said arm delivers to said pin and said pin drains excesslubricant to and along said trough to lubricate 10 other bearings.

30. In a linkage, in combination, a pitman comprising a blank of metalbent into a closed generally rectangular tube, the upper side of saidtube cut-away at one end, a U-shaped yoke strad- 15 dling the sides ofsaid tube and closing the end thereof, a metallic boot extending overthe sides and end of said yoke and having a neck above said tube, anoperating arm for said pitman encircled by said neck and extendingthrough the open end of the top of said tube and having an eye at itslower end and a pivot pin lodged in the sides of said boot, said yokeand said tube and extending through said eye.

31. In a linkage, in combination, a pitman comprising a unitarygenerally rectangular tube of unitary sheet metal, a metal block fillingone end of said tube and riveted in place therein, and having a threadedshank extending therebeyond and a terminal socket for said pitmanadjustably threaded upon said shank, said shank having an axial boretherethrough to deliver lubricant to the terminal socket from the lengthof said tube.

32. The combination set forth in claim 31 in which the shank iseccentric with respect to the tube and near the bottom thereof forfacility in draining the lubricant thereto from the length .of the tube.

33. In a motor vehicle of the type having a 40 chassis frame, wheelsprovided with brake mechanisms upon which wheels, said frame issupported, and a brake control carried by said chassis frame; a linkageenabling operation of said mechanism by said control including avertically de- 45 pending lever member pivotally connected at its upperend to the chassis frame and provided with an internal lubricantpassageway extending substantially along the axis of said lever from endto end thereof, said lever being provided at its 50 lower end with alever bearing element; a substantially horizontal elongated pitmanmember, slightly sloping downwardly, of hollow construction having areceptacle at its upper end to receive said lever bearing element, saidreceptacle 55 also being provided with cup means to embrace and enclosesaid lever bearing element, and with means to form a bearing for saidlever bearing element, said lubricant being fed to said bearing by saidlever lubricant passageway, and the ex- 60 cess of lubricant overflowinginto said cup means, and then flowing from said cup means into theinterior of said hollow pitman; the lower end of said pitman beingprovided with a lower pitman bearing element and with a receptaclereceiving 65 lubricant from the hollow interior of the pitman, saidsecond receptacle receiving lubricant from said hollow interior of saidpitman and being fed through a bore in the end of said pitman leading tosaid lower pitman bearing element; and a sec- 70 ond lever extendingdownwardly toward the brake mechanism and at its upper end having abearing element cooperating with said lower pitman bearing element, saidupper end being enclosed in said receptacle and said second lever 75being provided with a longitudinally extending lubricant passageway fedfrom said hollow pitman through said bearing between said lower pitmanbearing element and said second lever bearing element.

34. Ina linkage, in combination, a composite lever comprising a pair ofstamped meta-1 members associated together, a U member, the ends of saidstampings being reversely bent, each to embrace the adjacent leg of theU member, an eye member straddled by said U member, and a bear- Ving pinextending transversely through said U member and said eye, the compositelever having a longitudinal duct embossed therein feeding lubricant tosaid bearing pin.

GEORGE BIJUR, Executor of the Estate of Joseph Bifur, Deceased.

